I don't know the name of this plastic film either. I wonder how this three-dimensional movie was made. It's amazing.

This kind of plastic film is called stereoscopic grating film or three-dimensional grating film. The working principle is to use grating technology to create stereoscopic visual effects.

Look at the dense small stripes of the three-dimensional grating film. It is these microstructures that refract diffracted light and make objects look more stereoscopic. When you look at it from different angles, they will make your eyes receive different image information, and then they will produce the visual effect of three-dimensional movement.

The first step of making the star pattern of the three-dimensional grating film is to design the image and make the grating plate, and then match the designed image with the grating plate (that is, the plastic film with microstructure). This step requires special printing or embossing technology, so that each pixel of the image can be accurately aligned with the microstructure on the grating plate. Print or transfer the designed stereoscopic image to the grating plate. This also requires the use of special inks and dyes, as well as higher printing technology. Finally, the grating film should be cut and shaped, and then made into three-dimensional star-shaped decorative products.

Stereo grating film technology is used in various decoration, packaging, advertising and anti-counterfeiting applications, and is favored because of its unique visual effects. Although it looks amazing, it is a clever combination of optics and manufacturing technology.